class DerefValidatorDecorator:
"""Dereferences instance if it is a $ref before passing it for validation.
:param instance_resolver: Resolves refs in the openapi service spec
"""
def __init__(self, instance_resolver):
self.instance_resolver = instance_resolver
self.visiting = VisitingManager()
def __call__(self, func):
def wrapped(validator, schema_element, instance, schema):
if not isinstance(instance, dict) or '$ref' not in instance:
return func(validator, schema_element, instance, schema)
ref = instance['$ref']
# ref already visited
if ref in self.visiting:
return
self._attach_scope(instance)
with self.visiting.visit(ref):
with self.instance_resolver.resolving(ref) as target:
return func(validator, schema_element, target, schema)
return wrapped
def _attach_scope(self, instance):
log.debug('Attaching x-scope to %s', instance)
if 'x-scope' in instance:
log.debug('Ref %s already has scope attached', instance['$ref'])
return
instance['x-scope'] = list(self.instance_resolver._scopes_stack)
def __init__(self, instance_resolver):
self.instance_resolver = instance_resolver
self.visiting = VisitingManager()